I thought taking niacin with statins was a no-no?
Despite a few case reports of myopathy associated with niacin-statin (3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitor) combination therapy, 2 decades of clinical evidence since the introduction of statins do not support a general myopathic effect of niacin either alone or in combination with statins.
From a ScienceDirect abstract
Lipitor and niacin increases the risk for myopathy. No rates were given. Crestor ad said to consider decreasing the dose of crestor when adding niacin. Source: Sep 2009 Monthly Prescribing Reference
If HDL is low, talk to your doc.
that would be nitrates not niacin